Frequencies for first 10,000 rows of regdiv variable in nhamcsed2007 dataset :

  is ambulance |
     diversion |
      actively |
  managed on a |
regional level |
       vs each |
  hospital ado |      Freq.     Percent        Cum.
---------------+-----------------------------------
         blank |        103        1.03        1.03
       unknown |        819        8.19        9.22
not applicable |      3,046       30.46       39.68
           yes |      3,902       39.02       78.70
            no |      2,130       21.30      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016